exam Maths Puzzle Numerical Ability

If (x) = x-3/5, then the value of f(8) equals...

(PS: Please show how you worked it out. I have been having mojor problems with these kinds of questions. Thanks.)

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exam Other Question

If 0 < n < 1, which of the following gives the correct ordering of square root of n, n, and n squared?

(A) square root of n < n < n squared
(B) square root of n < n squared < n Perform the indicated operations. Simplify if possible.

42/7x + 40/8x